Polishing-machine



(No Model.) 3 Sheet s$heet 1.

MVD. WAYMAN.

POLISHING MACHINE. No. 514,528. Patented Feb. 13, 1894.

WITNESSES INVENTOR (No Model.) a Sheets-Sheet 2. M. D. WAYMAN. POLISHING MACHINE.

No. 514,528. Patented Feb. 13, 1894.

(No Model.) 3 sheets sheet 3.

' M. DpVVAYMAN.

POLISHING MAGHINE. I No. 514,528. Patented Feb. 13, 1894.

xv l. ==EE=E= =25: l 5 4 M I MN. QM. M 0 M fi Q H INLHH A 1% 3 v mm mm UNITED STATES PATENT Onrrcn.

MARCUS D. \VAYMAN, OF FORD CITY, PENNSYLVANIA.

POLISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 514,528, dated February 13, 1894;.

Applicationfiled May 31, 1892. Serial No. 434.922. (No model.)

To aZZ whom it may concern.-.

Be it known that I, Masons D. VVAYMAN, of Ford City, in the county of Armstrong and State of Pennsylvania, have invented anew and useful Improvement in Polishing-Ma chines, of which the following is a full, clear, and exact description. 1

My invention relates to the construction and arrangement of tables and apparatus used in grinding and polishing plate glass,

and it consists in the construction of the drawings, forming part of this specification,

in which- Figure 1 is a plan view of my improved apparatus. Fig. 2 is a front elevation of the same. Fig. 3 is an end elevation. Fig. 4 is a plan View, partly in section ofthe step. Fig. 5 is a vertical sectional view on the line V-V of Fig. 4. Fig. 6 is a detached sectional view of the step. Fig. 7 is a detached view, partly in section, showing the constructable most removed from the spindle or cention of the connection between the spindle and the rubber block; and Fig. 8 is a view of the rubber-block situate above a sectional segment of the table.

Like symbols of reference indicate like parts in each figure.

In the drawings, B represents the central portion of the table to which is firmly bolted the outer segmental parts A, so as to form an integral glass grinding and polishing table of the desired size. The upper portion of this table is composed of metal flanges or bars 2, which are so secured to each other as to form pockets 3 within which are secured blocks of wood 5, arranged so as to present a cross section of the wood as a level and even floor on which the glass plate may rest. The advantages of this construction are that the blocks being seated with the line of their grain in a .vertical position, it is impossible for the level of the table to be destroyed by warping, and the pores of the wood being exposed on the surface of the table, the plaster of-paris, or other material used in fixing the plate of glass to the table will set evenly and rapidly, as these poresabsorb the moisture therefrom, and, therefore, owing to the level of the table being maintained and the even setting of the plaster, the great difficulty heretofore found in securing the plate to the table is obviated and the ordinary loss by the breakage of plates on the table is materially lessened.

Situate above the table A is the jack 0 which carries the runners. This jack and the runners maybe of the ordinary form now in common use. Instead, however, of securing the runner'blocks either loosely to the runners so that they are left on the plate when the runners are raised, or rigidly to the runners, the blocks are connected with the runners by spindles 31, which pass through eyes in the runner-bars E, and through stirrups 32 which are secured to the blocks, into seats 33 formed in the top of the blocks, and these spindles are secured to the bars E by the nuts 30 and 35 and are held in engagement with the stirrups 82 by the nuts 34. Owing to this arrangement, the blocks are allowed to move freely on their spindles and yet are lifted from the plate of glass when the runners are raised.

Owing to the fact that the surface of the ter of the table is of greater area than points near the center, the glass on the outer portion of the table in apparatus heretofore used receives less rubbing than the parts nearer the center, and this difficulty cannot be obviated by increasing the number of blocks on the runner. To obviate this difficulty I place at one side of the table a jack-stand O, which is provided with one or more rubbers H, which may be the same in construction as the runners E on the jack 0. These additional runners situate at this point give additional grinding or'polishing surface at and near the periphery of the table without increasing the grinding or polishing surfacesat and near the center, and by this means the plates may be ground and polished evenly throughout their area.

ICO

One of the objections to the polishing tables in general use is that being supported on an ordinary solid step, the step is soon rendered unserviceable by friction, which heats and wears the parts. To remedy this difficulty, I employ the devices shown in Figs. 4, 5 and 6 of the drawings, inwhich the spindle K is shown seated in its usual casing, but instead of a solid step I employ the hollow step 0, having water-cavities formed therein, and delivery and exit water pipes 9 and 10, which allow a complete circulation of water through the step. By these means the spindle and step are kept cool and instead of having to adjust and repair the spindle and step every one or two weeks, I can run the same for the period of twenty months or more without adjustment or repair.

In order to permit repairs being made to the step or the'replacement of the same without lifting the table, I form the casing of the bearing in parts, as is shown in Fig. 4, and bolt the parts together. The step is dovetailed in the base-plate, as is shown in Fig. 5, and by merely lifting the shaft or spindle an inch or more, so that the weight is removed from the step, the step may be pulled out, the sides of the bearing being removed, and another step put in its place. I

In finishing plate glass, it is customary to first grind the plate on the grinding table and then remove the plate to the polishing table, where it is polished, and many plates are usually broken, in this transfer, which also requires the expenditure of time and labor. To obviate this diflficultyI form the grinding and polishing table A, B, as a separate part from the spindle K and table W, which table is connected with the spindle K and is adapted to support the table A, B, during the grinding or polishing operation.

Journaled to the table A B are the car wheels j. Below these wheels are the sections of track 1', which sections are supported by the piston rods of the hydraulic cylinders V, normally slightly below the wheels j when the table A B is resting on the table W. (See Fig. 3.

When it is desired to move the table A B from the grinding jack to the polishing jack, hydraulic pressure is exerted in the cylinders V, which brings the rail sections r in-cont-act with the wheels j and lifts the table A B from the table W, the rail-sections r rising to the level of the track 0. The table A B, carrying the plate of glass, is then moved along the track 0' until it passes on the lifting railsections of the polisher, which, as well as the supporting table, are the same in construction and arrangement as the rail-sections and supporting-table W of the grinding appara tus, shown in Fig. 3, and the table A B is lowered by the hydraulic cylinders of the polishing apparatus, which are the same in construction and arrangement as the cylinders shown in Fig. 3, until it rests on the supporting table of the polisher. By these means the plate of glass is removed from the grinding apparatus to the polishing apparatus without being disturbed from its position on the table A B, which serves in the polishing as well as in the grinding of the plate.

The advantages of my improvement will be apparent to those skilled in the art. I

Having thus described my invention, what Iclaim, and desire to secure by Letters Patent, is-

1. In a glass plate polishing or grinding machine, auxiliary rubbers placed on a stand near the periphery of the table; substantially as described.

2. In a glass plate polishing or grinding machine, a table having a series of pockets containing wooden blocks; substantially as described.

3. In a glass plate polishing or grinding machine, a table having a series of pockets containing Wooden blocks cut across the grain; substantially as described.

4. A glass finishing plant, comprising a grinding apparatus, a polishing apparatus, a track connecting the same, and means for raising and lowering the glass grinding and polishing table and for transferring it on the track from one apparatus to the other; substantially as described.

In testimony whereof I have hereunto set my hand this 6th day of May, A. D. 1892.

MARCUS D. WAYMAN.

Witnesses:

W. B. 'CORWIN, H. M. OoRwIN. 

